The NEC NX7700x system requires an updated errata kernel for kdump to complete

Updated -

Issue:

The NEC NX7700x A2080H-240 system requires an updated errata kernel in order for kdumps to successfully complete.

Environment:

RHEL6.5
NEC NX7700x A2080H-240
kdump

Description:

Previously, on systems with large IO configurations (like the NEC NX7700x A2080H-240), the kdump kernel could experience a kernel panic or become unresponsive during boot due to lack of available interrupt vectors. As a consequence, kdump failed to capture a core dump. To increase a number of available interrupt vectors, the kdump kernel can boot up with more CPUs. However, the kdump kernel always tries to boot up with the bootstrap processor (BSP), which can cause the kernel to fail to bring up more than one CPU under certain circumstances.

Resolution:

Red Hat has released a kernel errata update to address this issue. This update introduces a new kernel parameter, disable_cpu_acipid, which allows the kdump kernel to disable BSP during boot and then to successfully boot up with multiple processors. This resolves the problem of lack of available interrupt vectors for systems with a high number of devices and ensures that kdump can now successfully capture a core dump on these systems.

The version of the errata kernel with the fix is: kernel-2.6.32-431.20.3.el6

For information on the advisory, and where to find the updated
files, follow the link below.
~~~
http://rhn.redhat.com/errata/RHSA-2014-0771.html

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